Elastic-fluid turbine



E. D. DICKINSON. ELASTIC FLUID TURBINE. LICATION FILED IAN.I5 1

Patented Ju'iy 20, 1920.

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.QMNNZ Wm w M t an M VD 5 my 3 I d UNITED STATES PATENT OFFICE.

EDGAR I). DICKINSON, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

To all whom it may concern:

Be it known that I, EDGAR D. DICKINSON, a citizen of the United States, residing at Schenectady, in the county. of Schenectady, State of New York, have invented certain new and useful Improvements in Elastic- Fluid Turbines, of which the following is a specification.

The present invention relates to elastic fluid turbines, particularly the rotors of such machines, and has for its object to provide an improved arrangement for fastening the buckets or blades in position on the turbine rotor.

For a consideration of what I believe to be novel and my invention, attention is directed to the accompanying description and the claims appended thereto.

I11 the drawing, Figure 1 is a radial sectional view of a part of a turbine rotor, here shown in the form of a wheel, having buckets or blades fastened thereon in accordance with my invention; Fig. 2 is a side elevation of a portion of a rotor as shown in Fig. 1; and 3 is a view similar to Fig. 1 of a modification.

Referring to the drawing, 5 indicates the web of a turbine wheel and 6 the rim. On one side the rim is cut away to form an an nular flange 7 in one surface of which is a shallow recess 8. In the peripheral face of rim 6 and adjacent to flange 7 is an annular recess 9. On its periphera-l'face flange 7 is provided with an annular projection 10. 11 indicates the buckets which are arranged in a ring around the'wheel. The base of each bucket comprises aleg 12 the end of which is originally shaped as indicated by the dotted lines a, and a projection 13 adapted to hook over projection 10 on flange 7. In assembling the buckets on the wheel rim the buckets are put on from the side, no filling opening or slot being required. Projection 13 is hooked over projection 10 and the bucket is brought to a radial position. The end of leg 12 is then staked or driven into recesses 8 and 9 to bring it to the position shown in full lines in Fig. 1. This firmly fastens the bucket to the wheel rim and holds it from either lateral or radial displacement.

In Fig. 3 is illustrated an arrangement similar to that shown in Figs. 1 and 2 except that the leg 12 of the bucket is provided initially with a projection 15 adapted to fit V Specification of Letters Patent.

Patented July 20, 1920.

Application filed. January 15, 1920. Serial No. 351,576.

into recess 8. Also the recess 9 in rim 6 is shown in Fig. 3 as being of somewhat diiferout form from that of recess 9 of Figs. 1 and 2' although the material of the bucket leg is staked down into it in a similar manner. In this arrangement the bucket leg 12 is provided with a diagonally drilled hole 16 which originally extends down as far as the dotted line b. After a bucket is hooked into place on flange 7 the material at the bottom of hole 16 is driven down into recess 9 as shown in full lines, thereby fastening the bucket against lateral displacement. Otherwise the arrangement of Fig. 3 is substan tially the same as that of Figs. 1 and 2, and similar reference characters, with the eX- ponent a added, have been applied to corresponding parts.

It will be clear that by means of my invention, I am enabled to hook the buckets onto the rotor rim from one side and then stake them into place. This is an easily performed operation which may be done by relatively unskilled labor and at a low cost. At the same time the buckets are firmly fastened to the rim. Also in case it is necessary to remove a bucket or buckets for repair purposes this can be readily done and new buckets substituted without disturbing all the buckets on the wheel and without the use of special machinery. With the arrangement shown in either Figs. 1 and 2 or Fig. 3, the calking tool used in fastening the buckets in place can be inserted and held at a high angle. This is of great advantage in making an emergency repair as it enables the calking tool to be inserted between adj acent rings of buckets without difficulty.

It will also be noted that there are but few surfaces to be finished and accurately fitted for the fastening means, which of course reduces the cost of manufacture.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the apparatus shown is only illustrative and that the invention may be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. In an elastic fluid turbine, the combination of a rotor having a rim provided with a recess in its surface, an annular flange projecting from such surface, said flange having arecess in the side adjacent to said first named recess, a bucket having a part which hooks over the edge of said flange, and a legwhich engages in said recesses, the end of said leg being driven into said recess in therini after the bucket is in position.

i 2. In an elastic fluid turbine, the combina tion of a rotor having a rim provided with a recess in its surface, an annular flange projecting from such surface, said flange having a recess in the side adjacent to said first named recess, an annular pro ection on sald flange, and buckets having parts Wh1ch are hooked over said projection and legs which are staked into said recesses, 1

8. In an elastic fluid turbine, a Wheel having a rim, an annular-flange projecting from one side of the periphery of said rim, an annular projection on said flange, the surface of said rim and the adjacent surface of said flange being provided With recesses, and buckets having parts Which hook over said annular projection; and legs having parts Which are located in said recesses.

In Witness whereof I have hereunto set my hand this 13th da) of January, 1920.

EDGAR n DICKINSON. 

